28534199 has 4 divisors (see below), whose sum is σ = 28828464. Its totient is φ = 28239936.

The previous prime is 28534189. The next prime is 28534213. The reversal of 28534199 is 99143582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28534199 - 2⁴ = 28534183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28534139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146987 + ... + 147180.

It is an arithmetic number, because the mean of its divisors is an integer number (7207116).

Almost surely, 2^28534199 is an apocalyptic number.

28534199 is a deficient number, since it is larger than the sum of its proper divisors (294265).

28534199 is an equidigital number, since it uses as much as digits as its factorization.

28534199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294264.

The product of its digits is 77760, while the sum is 41.

The square root of 28534199 is about 5341.7411955279. The cubic root of 28534199 is about 305.5778670993.

The spelling of 28534199 in words is "twenty-eight million, five hundred thirty-four thousand, one hundred ninety-nine".